Abstract

The pressure drop for a straight horizontal section of pipe for the solids-gas mixture can be calculated using Equation 1, as given by Barth (1]. This expression was considered by Weber [2] as applicable only to coarse particles in dilute-phase flow. However, this equation has been used subsequently by various researchers [3 to 7] to predict the pressure loss for dense-phase flow of fine powders, suth as fly ash.